How to Evaluate JavaScript code from .NetCore

Question

I need to evaluate Javascript code from .netcore 2.1 project

    string vRule = "var input = arguments[0]; if (!input) return \"\"; if(input.length != 7) return \"a fixed string length of 7 is required\"; else return \"\"";
    string spResponse = "sdfsd23";

    string errorText =
        _jscriptEval.EvalToString(new List<object>
            {
                "var args = new Array('" + spResponse +
                "');\r\n validateRule(args);\r\n function validateRule(arguments){" + vRule +
                "}\r\n"
            });

Hi, @Pratik Bhoir, please provide the logic of your java script codes. From your codes, it's hard to understand and then we could try to transform for u. — Michael Wang
– Michael Wang, Commented Sep 1, 2020 at 9:45

D A · Accepted Answer · 2020-08-30 12:13:13Z

8

+100

You can use Jint. Jint implements the ECMA 5.1 spec and can be use from any .NET implementation (Xamarin, .NET Framework, .NET Core). Just use the NuGet package and has no dependencies to other stuff - it’s a single .dll and you are done! Just transform your javascript code into a function and run it like this (this is just an example, not your implementation):

  var engine = new Engine()
    .Execute("function MyFunction(a, b) { return a + b; }")
    ;

engine.Invoke("MyFunction", 1, 2); // -> 3

You have more explanations and examples on https://github.com/sebastienros/jint

answered Aug 30, 2020 at 12:13

D A

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1 Comment

Pratik Bhoir Over a year ago

Thanks, @d-a , I was searching for some similar package was not able to find.

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